o Use correct votingapi callback, it is:
  <module;>_votingapi_insert(...)

Side note:
o radioactivity_votingapi used callback <module;>_insert(...). It
  worked because that actually matched module <code>radioactivity</code> which is a dependency
  for radioactivity_votingapi. However, using same pattern for
  <code>radioactivity_up_down_voting</code> obviously missed
  the votinga callback... Hope we got this right this time!

o Introduce radioactivity_up_down_voting module
o Fix some radioactivity_votingapi descriptions

to radioactivity.inc. Utilize radioactivity.inc in radioactivity_node.module.
This is a fix for issue #301230.

o create and drop the rad_id sequence in install

o Fix description of click duration

o Add help texts for subtype settings

o Remove energy with class 'arb'

Fix harmless uninstall warnings, if radioactivity core is uninstalled before radioactivity_node or radioactivity_comment

o radioactivity_arbitrary_source
o radioactivity_arbitrary_target
o radioactivity_http

o Fix some strings a bit

have non-int ids.

  - fix postgres update
  - rename columns oid->id and oclass->class. Column oid was creating problems
    as PostgreSQL has internal meaning for it
  - fix energy adding for postgresql. There were typos there.
o Implement functionality to port views created against radioactivity 1.1 to
  forthcoming 1.2. This functionality is invoked by update.php.

  - introduce plugin-provided targets, e.g. node, comment.
  - introduce plugin-provided sources, e.g. node vote, node view, comment vote.
  - refactor energy settings decay profile admin form to reflect the above.
o Move node radioactivity functionality to new radioactivity_node -plugin.
o Introduce radioactivity_comment for comment target + views support. This
  makes comments radioactive.
o VotingAPI support plugin
  - provides radioactivity source from votingapi_insert action for nodes and
    comments
o Debug plugin
  - displays internal info for debugging purposes
  - manual energy action functionality
o Update functionality
  - enables automatically radioactivity_node as it's split from radioactivity
  - convert decay profile struct to new format. However, this doesn't support
    by_content_type flag.

energy settings from issue #247212.

"hotness" rank to nodes based on node views. The hotness rank is based on
simple but effective radioactivity model.